451160921 has 2 divisors, whose sum is σ = 451160922. Its totient is φ = 451160920.

The previous prime is 451160891. The next prime is 451160989. The reversal of 451160921 is 129061154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449906521 + 1254400 = 21211^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 451160921 - 2¹⁰ = 451159897 is a prime.

It is equal to p_23911229 and since 451160921 and 23911229 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (451160621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225580460 + 225580461.

It is an arithmetic number, because the mean of its divisors is an integer number (225580461).

Almost surely, 2^451160921 is an apocalyptic number.

It is an amenable number.

451160921 is a deficient number, since it is larger than the sum of its proper divisors (1).

451160921 is an equidigital number, since it uses as much as digits as its factorization.

451160921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 451160921 is about 21240.5489806643. The cubic root of 451160921 is about 766.9678477876.

The spelling of 451160921 in words is "four hundred fifty-one million, one hundred sixty thousand, nine hundred twenty-one".